Azimuthal asymmetry of coherent Cherenkov radiation from a tilted bunch

Результат исследования: Материалы для журналаСтатья

Аннотация

Modern accelerator technologies may provide electron beams consisting of ultrashort bunches with transverse sizes, which are much larger than longitudinal sizes. The spectral-angular characteristics of coherent Cherenkov radiation (CChR) produced by such bunches have thus been considered. We simulated the characteristics of CChR and those from a single charge on the basis of the polarization current model, which allowed us to consider finite sizes for the Cherenkov radiator. We calculated the angular distribution of the CChR from a bunch tilted by angle ψ with respect to the velocity direction, with the assumption of a 3-D Gaussian charge distribution in the bunch. Contrary to the azimuthally symmetrical distribution of conventional ChR, a strong azimuthal asymmetry was observed in the CChR from the tilted bunch. The maximal yield of the CChR may be achieved if the tilt angle ψ coincides with the Cherenkov angle Θ ch =arccos⁡(1/nβ), βc is the charge velocity and n is the refraction index.

Язык оригиналаАнглийский
Страницы (с... по...)888-893
Количество страниц6
ЖурналPhysics Letters, Section A: General, Atomic and Solid State Physics
Том383
Номер выпуска9
DOI
Статус публикацииОпубликовано - 28 фев 2019

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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